# p3Watch

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#1
this question seems simple enough but i cant seem to get the right answer!:

find the volume generated when r is completely rotated about the x axis

f(x) = 2x^1/4 a=1 b=16

thanks for any help
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14 years ago
#2
(Original post by eek)
this question seems simple enough but i cant seem to get the right answer!:

find the volume generated when r is completely rotated about the x axis

f(x) = 2x^1/4 a=1 b=16

thanks for any help
Volume = pi * INT f(x)^2 dx
=pi * INT 4x^1/2 dx
=pi (8/3)x^(3/2)

then stick in the limits.
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#3
oh ok!! i was timesing the powers when i shouild have added! thanks!
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